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# File actionpack/lib/action_controller/test_case.rb, line 426def process(action,parameters=nil,session=nil,flash=nil,http_method='GET')# Ensure that numbers and symbols passed as params are converted to# proper params, as is the case when engaging rack.parameters=paramify_values(parameters)# Sanity check for required instance variables so we can give an# understandable error message.%(@routes @controller @request @response).eachdo|iv_name|if!(instance_variable_names.include?(iv_name)||instance_variable_names.include?(iv_name.to_sym))||instance_variable_get(iv_name).nil?raise"#{iv_name} is nil: make sure you set it in your test's setup method."endend@request.recycle!@response.recycle!@controller.response_body=nil@controller.formats=nil@controller.params=nil@html_document=nil@request.env['REQUEST_METHOD']=http_methodparameters||={}controller_class_name=@controller.class.anonymous??"anonymous_controller":@controller.class.name.underscore.sub(/_controller$/,'')@request.assign_parameters(@routes,controller_class_name,action.to_s,parameters)@request.session=ActionController::TestSession.new(session)ifsession@request.session["flash"]=@request.flash.update(flash||{})@request.session["flash"].sweep@controller.request=@requestbuild_request_uri(action,parameters)@controller.class.class_eval{includeTesting}@controller.recycle!@controller.process_with_new_base_test(@request,@response)@assigns=@controller.respond_to?(:view_assigns)?@controller.view_assigns:{}@request.session.delete('flash')if@request.session['flash'].blank?@responseend